HTTP Endpoint Schemas

Response formats for the diagnostic endpoints listed on the Web Portal page.

`/outputs`

A JSON object keyed by module name, describing each enabled third-party output. Disabled or unconfigured modules are left out; {} means none are active.

Keys: mqtt, radmon, thingspeak, gmc, webhook, webapi and udpblip when Local Broadcast is on.

{
  "mqtt":       {"ok":true,  "age":42},
  "radmon":     {"ok":true,  "age":17},
  "thingspeak": {"ok":false, "age":91},
  "gmc":        {"ok":true,  "age":230},
  "webhook":    {"ok":false, "age":null}
}

Field	Meaning
`ok`	`true` if the last submission was accepted. For MQTT this means connected plus a successful recent publish.
`age`	Seconds since the last submission attempt completed, or `null` if none has been attempted yet.

udpblip has a different shape: {"mode":N,"group":"239.x.x.x","port":N,"fails":N}.

Use it as a lightweight health check for dashboards, scripts or Home Assistant REST sensors.

`/about`

Static identity of the device and firmware, plus the compiled-in modules. Runtime values (uptime, memory, RSSI) are in /json.

{
  "ver": "0.8.0",
  "git": "06a2d9d",
  "env": "espgeigerlog",
  "date": "Apr 15 2026 12:34:56",
  "chip": "ESP8266",
  "flash": "ef4016 DIO 40MHz",
  "mac": "AABBCCDDEEFF",
  "host": "ESPGeiger-a1b2c3",
  "g_mod": "genpulse",
  "g_type": "pulse",
  "g_test": false,
  "g_pcnt": true,
  "modules": ["disp","neopx","button","ntp","mqtt","radmon","whook","sercmd","serout"]
}

Field	Meaning
`ver`	Firmware version (release)
`git`	Short git commit the firmware was built from
`env`	PlatformIO build environment name (e.g. `espgeigerlog`, `esp32_pulse`)
`date`	Build timestamp (compile-time `__DATE__ __TIME__`)
`chip`	Chip model reported by the framework (`ESP8266` / `ESP32` / `ESP32-S2` etc.)
`flash`	Flash chip as booted: JEDEC id (ESP8266 only), mode and clock from the image header
`mac`	Device MAC address
`host`	Configured hostname
`g_mod`	Geiger model name. On serial builds this identifies the protocol (`GC10`, `GC10Next`, `MightyOhm`, `ESPG`).
`g_type`	Counter input type: `"pulse"`, `"serial"`, or `"none"` (UDP receiver and internal test builds)
`g_test`	`true` on test / simulation builds
`g_pcnt`	`true` if pulses are counted by the ESP32 PCNT hardware counter
`modules`	Module identifiers compiled into this firmware

`/json?raw=1`

By default mem is lightly smoothed and the device-load fields are left out to keep the frequently polled /json small. ?raw=1 reports mem un-smoothed and adds:

Field	Description
`tick`	Smoothed microseconds spent in the once-per-second housekeeping pass. Lower is better.
`t_max`	Worst-case `tick` in the last 60 seconds.
`lps`	Main-loop iterations per second, un-smoothed (last full second).
`frag`	Heap fragmentation, percent
`lfb`	Largest contiguous free block in bytes
`lfblow`	Largest-free-block low-water mark since boot, in bytes

lfb / lfblow are the honest measure of memory health: free heap can look fine while fragmentation shrinks the largest block that can be allocated.